Homo Sapiens. Страница 12
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Homo Sapiens
Ever tried tickling yourself? Wondering why it didn't work? When I was a kid, everybody was like that😉 The thing is that we need this peculiarity of perception (the sense of tickling) to recognize the threat. This is how we recognize various threats - insects, for example. You can hardly expect good things from them🙌🏻 We have little chance of seeing or hearing insects, so tactile sensations come in handy. But when we tickle ourselves, the body is well aware that this is not a threat☝🏻 -
Homo Sapiens
Ever wonder what gives our body the "assembly instructions"? How it figures out what it needs to build those billions of cells? Well, longtime subscribers and just well-informed people know the answer - all the information is hidden in the genome. But do you know how many genes are in it? Hardly😏 So, we tell you! There are about 25,000 genes in the human genome, that is - 25,000 instructions to create a functioning and thinking body! Each of them is responsible for assembling a certain "piece" of the body. For example, 858 of them describe the process of creating olfactory neurons. At the same time, 468 of them are pseudogenes - their ancient functions are disabled as a result of some mutation that deprived them of the ability to synthesize proteins. This explains why humans, despite the fact that the sense of smell plays a strategic role in their lives, do not smell as keenly as other mammals🤔 -
Homo Sapiens
Protein actively involved in the transport process MBTR is a transmembrane regulator of cystic fibrosis☝🏻 This protein is involved in the transport of chlorine ions across the cell membrane. Intracellularly, it is located on the surface of the apical membrane. MBTR is localized mainly in the epithelial cells of the respiratory tract, salivary and sweat glands, pancreas, and intestine. -
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Homo Sapiens
Phlebography is a method of examining veins Vessels appear as dark contours resembling branches☝🏻 Phlebography is a method of radiological examination of veins by injecting contrast into them. That is, it is essentially the same X-ray, just because of the contrast, doctors can see the condition of the veins. In practice, it is usually used for diagnostic evaluation of lower limb veins. -
Homo Sapiens
Skin is one of the most amazing parts of the body Interesting facts about it you can tell a dozen! Such as - the skin weighs more than the skeleton! Well, or at least weighs about the same. The human skeleton weighs about 5 to 6 kilograms, while skin weighs about 5.5 kilograms. Of course, it's not just skin per se. The epidermis, dermis, and subcutaneous fat also count. -
Homo Sapiens
A touching moment, when cesarean section doctors allow the baby to come into the world on its own, making the operation as close to natural childbirth as possible. By pressing on the abdomen, the surgeon imitates the mother's pushing. -
Homo Sapiens
The main pathway of nerve impulse transmission Synapse☝🏻 The connection point between two neurons or a neuron and a cell that receives a signal. Interestingly, during synaptic transmission, the amplitude and frequency of the signal can be adjusted. One of the main "heroes" of this process is a mediator. It triggers the chain of reactions, which ensures the impulse transmission. 
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Homo Sapiens
The kidneys are an organ into which infection can come both "from below" and "from above". This feature is manifested by pyelonephritis. It is a nonspecific infectious and inflammatory process characterized by simultaneous or sequential involvement of the calyx-lobar system and the kidney parenchyma (main tissue). Pyelonephritis can be "ascending" - this is when the infection comes to the kidney "from below", from the lower parts of the urinary system (bladder, ureter, etc.), where the pathogen originally entered. And "descending" - in this case the infectious agent enters the kidney through the blood, "from above". Most often pyelonephritis develops as a result of infection through the blood, as in the animation☝🏻 -
Homo Sapiens
Internal organs can be hollow or parenchymatous. The first include the esophagus, stomach, small intestine, large intestine, ureter, etc. Their main peculiarity is that they have a cavity limited by a wall inside them. They can be conventionally depicted as in the animation☝🏻 But parenchymatous organs do not have any cavity inside themselves - they have a connective-tissue skeleton, the basis of the organ supporting its functional (working) tissue. Such organs include liver, kidneys, lungs, etc. -
Homo Sapiens
One of the important stages of labor Opening of the cervix☝🏻 This process occurs gradually: in the beginning the cervix flattens out, then the pharynx opens to 3-4 cm and at the end of the first period of labor to 10 cm. This is the full opening of the cervix, which "starts" the second period of labor - the birth of the fetus. -
Homo Sapiens
Visualization of skin cancer There are three main types of skin cancer - basal cell carcinoma, squamous cell carcinoma, and melanoma. Skin cancer can develop anywhere, but more often the tumor appears on the face: the corner of the eye, the wings and back of the nose, and the forehead are affected. Skin cancer partially develops on sun-exposed skin☝🏻 -
Homo Sapiens
How often do you think a person blinks? How many times a minute do we make this movement? 10, 20, or 30 times? All answers don't fit. In one minute, the average person blinks at least 30 times! By the way, precisely because we work with gadgets more often - this average has begun to shrink slightly. And people whose work is directly related to many hours of contact with the screen, develop dry eye syndrome. This pathology is a change occurring on the surface of the cornea and conjunctiva due to the lack or poor quality of tear fluid. -
Homo Sapiens
How to profit 3,700 dollars from the sale of one picture? This NFT was bought for 300 dollars and sold for 4,000. It's only been six days. Yeah, no one ever thought this would be possible😏 How to get started with NFT if I don't get anything at all about it? Join the channel where you’ll be introduced to the topic and told all the tricks of working with NFT! 💰 👉🏻 @NFT_metaverses 
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Homo Sapiens
Does acupuncture work? All these lines and points drawn by supporters of alternative medicine🤔 Well, we may disappoint someone, but the verdict on this has long been laid out. Acupuncture is not an effective treatment, has no scientific basis and is a placebo manipulation. However, medicine is now in doubt about this verdict. Acupuncture is now rather positioned as a technique with "uncertain clinical relevance". Official medicine of course does not suggest the influence of these procedures through "etheric currents inside the person". But there is some positive evidence. For example, acupuncture may be effective in the management of chronic pain in people with fibromyalgia. How and why? Well, there is no clear answer to that question. And there is no evidence of a positive effect of acupuncture in 99% of its "indications"🙌🏻 -
Homo Sapiens
Why do our intestines bear different names? Duodenum, jejunum, ileum, blind, ascending transverse... Wouldn't it be easier just to call everything "intestine" and why does the body need different "types" of intestine at all? The answer is more than simple - each department is unique in its own set of properties and functions🙌🏻 The duodenum, for example, is where the secret of the pancreas and gallbladder comes out through the papillae - an absolutely unique property. And in the next sections of the small intestine, digestion as such takes place. In the large intestine is a different task - the absorption of water and the formation of food mush (chyme) formed stool. So, the different names are not a whim of doctors - it's a physiological necessity. -
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Homo Sapiens
How do the particles get into the cell? What do they pass through and how does the cell ensure this passage? Only one word answers this question: pinocytosis. It is the process of the cell surface capturing the liquid with the substances it contains. The cell sort of sucks it into itself. It is one of the most common mechanisms of cellular uptake of substances☝🏻 There are three mechanisms in total. -
Homo Sapiens
The process of cell division or mitosis A process so refined and mastered by our body that it can be admired forever🙌🏻 -
Homo Sapiens
Did someone's parents forbid them to sit on the toilet for a long time when they were a child? We realize that the info is somewhat personal, so we don't expect a specific answer from you😁 However, we want to say that parental advice does make sense. The fact is that excessive effort in the process of defecation leads to a strong increase in pressure inside the intestine. If fecal defecation is difficult, it can lead to the appearance of diverticula - bulges in the wall of the organ☝🏻 The danger of this pathology is that an inflammatory process occurs in place of this "protruding" area. And it can lead to damage to the intestinal wall and the development of peritonitis as a consequence. As you may know, peritonitis is an extremely dangerous condition that requires emergency surgery. So, yeah. Take your parents' advice - don't stay in the bathroom for too long😅